My problem: I'm getting this error System services not available to Activities before onCreate() and i have no idea how to fix it. I've searching and some people talk about the initialization before onCreate() method... Waht i want to do? It's simple. I'm receiving the heart rate and i put that on a screen "data". When the value of the heart rate it's lower than 40 or bigger than 120 occurs an anomaly and i want get the gps location at the moment (to send to a data base not to put that on the screen) sorry about my english
Class GPSTracker
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
public class GPSTracker extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
Class Anomaly
import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;
public class Anomaly extends Activity {
GPSTracker gps;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.data);
}
public void abnormalHRDetected(int heartRateInt) {
if (heartRateInt < 40 || heartRateInt > 120) {
//dispara o trigger e escreve na BD o valor
gps = new GPSTracker(Anomaly.this);
// check if GPS enabled
if(gps.canGetLocation()){
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
//é suposto actualizar a posição e devolver as coordenadas
}
}
private void FallDetected() {
//dispara o trigger
}
private void AbnormalTemperatureDetected(int temperature) {
//dispara o trigger e escreve na BD o valor
}
}
logcat
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 D/BluetoothLeService: Received heart rate: 63
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 D/BleActivityOld: HeartRate: 63
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 W/System.err: java.lang.IllegalStateException: System services not available to Activities before onCreate()
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 W/System.err: at android.app.Activity.getSystemService(Activity.java:4745)
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.GPSTracker.getLocation(GPSTracker.java:52)
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.GPSTracker.<init>(GPSTracker.java:47)
10-19 14:27:06.386 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.Anomaly.abnormalHRDetected(Anomaly.java:24)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.BleActivityOld.getHeartRate(BleActivityOld.java:129)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.BluetoothLeService.getHeartRate(BluetoothLeService.java:136)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.BluetoothLeService.broadcastUpdate(BluetoothLeService.java:155)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.BluetoothLeService.access$500(BluetoothLeService.java:21)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at com.example.nunog.myapplication12.BluetoothLeService$1.onCharacteristicChanged(BluetoothLeService.java:130)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at android.bluetooth.BluetoothGatt$1.onNotify(BluetoothGatt.java:423)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at android.bluetooth.IBluetoothGattCallback$Stub.onTransact(IBluetoothGattCallback.java:403)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at android.os.Binder.execTransact(Binder.java:404)
10-19 14:27:06.396 1256-1268/com.example.nunog.myapplication12 W/System.err: at dalvik.system.NativeStart.run(Native Method)